Am 10.11.2022 um 13:03 schrieb Greg Wooledge: > If it turns out that '?' really is the filename, then it becomes a ZFS > issue with which I can't help.
just tested: i could create, rename, delete a file with that name on a zfs filesystem just as with any other fileystem. But: i recall having seen an issue with corrupted filenames in a snapshot once (several years ago though). At the time, i did resort to send/recv to get the issue straightened out. But it is very much more likely, that the filename '?' is entirely unrelated to zfs. Although zfs is perceived as being easy to handle (only 2 commands need to be learned: zpool and zfs), it takes a while to get acquainted with all the concepts and behaviors. Take some time to play with an installation (in a vm or just with a file based pool should be considered).
